Multiday events (an idea)

Hopefully its a good one because I spent a lot of time on it...

They start visible (showing at 3 a.m. bc i figured there would be the least conflicts there), with the option to toggle them off. 

Also added email subscribers functionality, as well as viewing events/subscribers styling. still can't create or edit an event because of the problem in the last PR.

I also emailed you about the Google Groups problem. 

The mailer is in the works; its just some basic querying and styling anyway for the daily bulletin.